爬虫发出ajax请求，requests能获取正常响应，scrapy发出请求却返回400

Question

我爬取一个网站，数据是要向服务器发出异步请求加载带，我仿造headers,参数都没有错误，用requests能获取正常响应，当scrapy不行

    def parse_histical_data(self, response):
        html = BeautifulSoup(response.body, 'lxml')
        patterm = re.compile(r'smlId: [0-9]*', re.MULTILINE|re.UNICODE)
        script = html.find('script', text=patterm).text
        smlId_text = patterm.search(script).group()
        smlId = smlId_text.split(' ')[1]
        curr_id = response.meta['pair_id']
        header=html.select('#leftColumn > div.instrumentHeader > h2')[0].string
        st_date = '01/01/2001'
        end_date = '05/07/2050'
        interval_sec = 'Daily'
        sort_col = 'date'
        sort_ord = 'DESC'
        action = 'historical_data'
        data = {'smlID': smlId, 'curr_id': curr_id, 'header': header, 'st_date': st_date, 'end_state': end_date,
                'interval_sec': interval_sec, 'sort_col': sort_col, 'sort_ord': sort_ord, 'action': action}
        head = self.download_headers.copy()
        request = FormRequest(self.his_url, callback=self.parse_histical_data,
                              headers=head, formdata=data)
        yield request
        

请求带网址是'https://www.investing.com/ins...'，使用一模一样带headers和data，scrapy返回400

Answer 1

一般来说请求头的问题：
注释掉 headers 里面的 Content-Length 这一栏

Answer 2

请问楼主解决了吗，遇同样问题，请问咋解决呢

Answer 3

请求头有错误